Meet antimony. It's number 51 on the periodic table of elements, but potentially number 1 in terms of cost-efficient materials for energy storage.
And it's considered "liquid-metal", which sounds like the kind of music the older teenage boys in the neighborhood are listening to when they drive by with their car windows down -- heads banging and air guitars rockin'.
And yet here we are, putting millions of dollars of research and development into it as a practical and cost-efficient material to power our energy grid. We just need to heat this thing to 1,167°F (630.6°C) to melt it down to a liquid.
Rock on!

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